Specifications: Bluetooth 5.1 wireless technology can ensure high-quality strong signal transmission and provide high-fidelity stereo music. The product has high-quality speakers and vibration diaphragms, which can provide clean and excellent sound quality. Built-in high-capacity 450mAh rechargeable battery, which can provide about 4 hours of working time. This portable bluetooth speaker is lightweight and compact, allowing you to carry it with you, and suitable for more occasions. Item Name: Bluetooth Speaker Material: ABS, Aluminum Alloy Bluetooth: V5.1 TF Card: Support Speaker Output: 5W Distortion: ≤5 Percent Signal And Noise: 95DB Bluetooth Communication Protocol: A2DP, AVRCP, HFP, HSP Battery: Built-in Battery/450mAh (Included) Charging Voltage: DC 5V Charging Time: About 3 Hours Talk Time: About 5 Hours Play Time: About 5 Hours Features: Portable, Convenient, Pocket-sized, Stereo Bass Player Size: 9.1cm x 4.8cm x 2cm/3.58" x 1.89" x 0.79" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bluetooth Speaker 1 x USB Cable